How to crop and fix this 16:9 video?

[brassplyer]

I have this 16:9 video shot with a Digital8 cam. For some reason it has a 30 pixel border around it. It was shot years ago and has been sitting on an archive hard drive and I have no recollection of how or why it got that way. It definitely didn't come out of the camera that way. What I want to do is get rid of the border and end up with properly sized, properly interlaced 16:9 720x480 video in as few steps as possible. I find that just cropping 30 pixels off all around screws up the interlacing and I end up with a mess.

What do you suggest?

Thanks for all input.

[davexnet]

How about something like this? There are probably some other methods, should be interesting to see any variations.

Load_Stdcall_plugin("F:\Program Files\AviSynth 2.5\plugins\ConditionalSmoothBob\yadif.dll")
directshowsource("I:\itemp\#i misc\3secborder.avi")
yadif(mode=1,order=0)
#
crop(28,28,-28,-28)
lanczosresize(720,480)
separatefields().selectevery(4,1,2)
weave()

[brassplyer]

How about something like this? There are probably some other methods, should be interesting to see any variations.

Load_Stdcall_plugin("F:\Program Files\AviSynth 2.5\plugins\ConditionalSmoothBob\yadif.dll")
directshowsource("I:\itemp\#i misc\3secborder.avi")
yadif(mode=1,order=0)
#
crop(28,28,-28,-28)
lanczosresize(720,480)
separatefields().selectevery(4,1,2)
weave()

Where do you find ConditionalSmoothBob?

[manono]

Where do you find ConditionalSmoothBob?

That's a folder name. It's Yadif he's using to Bob before cropping and resizing, and then finally reinterlacing.

Keep an eye on the field order.

[davexnet]

Or this variation - skips the Bob, probably much faster.

directshowsource("I:\itemp\#i misc\3secborder.avi")
separatefields()
crop(28,14,-28,-14). lanczosresize(720,240).weave()

Here is ConditionalSmoothBob in case you couldn't find it.

[brassplyer]

Where do you find ConditionalSmoothBob?

That's a folder name. It's Yadif he's using to Bob before cropping and resizing, and then finally reinterlacing.

Keep an eye on the field order.

I modified it and am using QTGMC instead. His reinterlace config didn't work right - I believe (4,1,2) sets it to TFF? I used this modification of his script. I cropped 32 pixels instead of 28 since I don't want that slight border at the edges. I can live with 2 fewer pixels. Apparently it needs to be multiples of 4 to work correctly.

He definitely pointed me in the right direction though.

What I'm going to do is deinterlace/crop first, hit that file with Neatvideo and possibly Thalin Deshaker, then do the reinterlace in a separate step.

SetMTMode(3,4)
directshowsource("W:\sourcevid.avi")
ConvertToYV12
SetMTMode(2)
QTGMC(preset="slow")
crop(32,32,-32,-32)
lanczosresize(720,480)
separatefields().selectevery(4,0,3)
weave()

[2Bdecided]

Or this variation - skips the Bob, probably much faster.

directshowsource("I:\itemp\#i misc\3secborder.avi")
separatefields()
crop(28,14,-28,-14). lanczosresize(720,240).weave()

You shouldn't do interlaced resizing just by separating fields - the fields end up slightly misaligned. Sometimes visible, sometimes not - depends entirely on the relationship between the original and final vertical height. Not worth taking the chance.

[2Bdecided]

I modified it and am using QTGMC instead.

much better.

What I'm going to do is deinterlace/crop first, hit that file with Neatvideo and possibly Thalin Deshaker, then do the reinterlace in a separate step.

If you weren't doing other processing, I was going to suggest just putting up with the borders. Even with correct deinterlacing, it'll look worse after you've cropped+expanded it. But with other processing to do as well, you might as well remove the borders at the same time.

separatefields().selectevery(4,0,3).weave()

If you put assumetff() before this, you get TFF. If you put assumebff() before this, you get BFF. If you put neither, you get whatever AVIsynth thinks is right at that point in the script, which is not something you should rely on.



Cheers,
David.

[davexnet]

Or this variation - skips the Bob, probably much faster.

directshowsource("I:\itemp\#i misc\3secborder.avi")
separatefields()
crop(28,14,-28,-14). lanczosresize(720,240).weave()

You shouldn't do interlaced resizing just by separating fields - the fields end up slightly misaligned. Sometimes visible, sometimes not - depends entirely on the relationship between the original and final vertical height. Not worth taking the chance.

Thanks for the info. Shame it wasn't reliable, would be so much quicker.
Is the misalignment vertical? Something to do with line bounce?

[jagabo]

Or this variation - skips the Bob, probably much faster.

directshowsource("I:\itemp\#i misc\3secborder.avi")
separatefields()
crop(28,14,-28,-14). lanczosresize(720,240).weave()

You shouldn't do interlaced resizing just by separating fields - the fields end up slightly misaligned. Sometimes visible, sometimes not - depends entirely on the relationship between the original and final vertical height. Not worth taking the chance.

Thanks for the info. Shame it wasn't reliable, would be so much quicker.
Is the misalignment vertical? Something to do with line bounce?

You see the problem easily using sharp horizontal edges or lines.

I can't seem to embed images?

orig.png is the source image:

sep.png:

crop(32,32,-32,-32)
separatefields()
lanczosresize(720,240)
weave()

qtgmc.png:

crop(32,32,-32,-32)
QTGMC()
lanczosresize(720,480)
separatefields()
selectevery(4,0,3)
weave()

[davexnet]

Or this variation - skips the Bob, probably much faster.

directshowsource("I:\itemp\#i misc\3secborder.avi")
separatefields()
crop(28,14,-28,-14). lanczosresize(720,240).weave()

You shouldn't do interlaced resizing just by separating fields - the fields end up slightly misaligned. Sometimes visible, sometimes not - depends entirely on the relationship between the original and final vertical height. Not worth taking the chance.

Thanks for the info. Shame it wasn't reliable, would be so much quicker.
Is the misalignment vertical? Something to do with line bounce?

You see the problem easily using sharp horizontal edges or lines.

Thanks for posting jagabo,
good demo.